A6214 and A6216: Automotive-Grade, Constant-Current 2 A PWM Dimmable Buck Regulator LED Driver

The A6214 is a single-IC switching regulator that provides constant-current output to drive high-power LEDs. It integrates a high-side N-channel DMOS switch for DC-to-DC step- down (buck) conversion. A true average current is output using a cycle-by-cycle, controlled on-time method.

Output current is user-selectable by an external current sense resistor. Output voltage is automatically adjusted to drive various numbers of LEDs in a single string. This ensures the optimal system efficiency.

LED dimming is accomplished by a direct logic input pulse-width-modulation (PWM) signal at the Enable pin. Alternatively, an Analog Dimming input can be used to calibrate the LED current, or implement thermal foldback in conjunction with external NTC thermistor.

The A6216 has the added capability to generate its own PWM dimming frequency and duty cycle in stand-alone mode.

The A6214 is provided in a compact 10-pin narrow SOIC package (suffix LK). The A6216 is in 16-pin TSSOP (suffix LP), both with exposed pad for enhanced thermal dissipation. It is lead (Pb) free, with 100% matte-tin leadframe plating.

Applications

Automotive lighting:

  • Daytime running lights
  • Front and rear fog lights
  • Turn/stop lights
  • Map light
  • Dimmable interior lights
SAMPLE & BUY

Astrorep Inc. (Allegro and Sanken Semiconductors, Sanken Power Supplies)
141 John Street, Suite 300
Babylon, NY 11702
Phone: (631)422-2500
Fax: (631)422-2504
Web: www.astrorepinc.com
Email: donna.tweedy@astrorepinc.com

If this is not your local representative, find your local sales rep here.

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  • Features and BenefitsFeatures and Benefits
  • PackagingPackaging
  • Technical DocsTechnical Docs
  • NewsNews
  • AEC-Q100 qualified
  • Supply voltage 4.5 to 55 V
  • 2 A maximum output over operating temperature range
  • Integrated MOSFET switch
  • Able to use either Schottky or silicon low-side diode
  • True average output current control
  • Internal control loop compensation
  • Integrated 5 V, 10 mA regulator for driving external load
  • PWM dimming via direct logic input down to 0.1% at 200 Hz
  • Standalone internal PWM dimming (A6216)
  • Analog dimming for brightness calibration and thermal foldback
  • Low-power shutdown (1 μA typical)
  • Fault flag output (A6216)
  • LED string open and short protection
  • Cycle-by-cycle current limit
  • Undervoltage lockout (UVLO) and thermal shutdown (TSD)
  • Robust protection against:
    • Adjacent pin-to-pin short
    • Pin-to-GND short
    • Component open/short faults
Packages

Design Support Tools

Click the image to view larger
Product Image A6214 Functional Block Diagram A6214 Typical Application A6216 Functional Block Diagram A6216 Typical Application

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check
Distributor Stock
APEK6214KLK-01-MH DEMO BOARD -20°C to 85°C No -- Contact your
local sales rep
Check Stock
A6214KLKTR-T 10-lead SOIC -40°C to 125°C Yes View Data Contact your
local sales rep
Check Stock
APEK6216KLP-01-MH DEMO BOARD -20°C to 85°C No -- Contact your
local sales rep
Check Stock
A6216KLPTR-T 16-lead TSSOP -40°C to 125°C Yes View Data Contact your
local sales rep
Check Stock

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.

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